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All apps are being assigned the same icon in Cinnamon panel+6 #100
The problem still happens. If you already have a browser window opened, it works correctly, otherwise, all apps launched by Web Apps get the same icon of the first app launched.
Linux Mint 20.1
Cinnamon 4.8.6
Brave Version 1.25.68 Chromium: 91.0.4472.77 (Official Build) (64-bit)
EDIT: Looks like it's a Cinnamon bug. I've tested in Mate Desktop and it works fine with Mate.
Sounds like the Web App tool needs to set the StartupWMClass to what Chromium makes!
Chromium ignores the --class flag when --app=URL is used and instead derives WM_CLASS from the app URL itself. It takes the URL host+path and converts it to a valid X11 class by replacing characters like . and / with _. So https://www.google.com/maps becomes www.google.com__maps.
For Firefox-based browsers, the exec string passes --class WebApp-{codename} and Firefox respects it, so WM_CLASS stays as WebApp-{codename} — the manager-assigned value.
Activity
Mek101 commentedon Apr 20, 2021
I confirm: happened to me when I was using cinnamon
Lurux commentedon May 26, 2021
I don't see this problem anymore, tested with both Firefox and Chromium web apps. Anyone can confirm ?
Mek101 commentedon May 26, 2021
Still having this issue with Firefox via Flatpak
gl-santos commentedon May 28, 2021
The problem still happens. If you already have a browser window opened, it works correctly, otherwise, all apps launched by Web Apps get the same icon of the first app launched.
Linux Mint 20.1
Cinnamon 4.8.6
Brave Version 1.25.68 Chromium: 91.0.4472.77 (Official Build) (64-bit)
EDIT: Looks like it's a Cinnamon bug. I've tested in Mate Desktop and it works fine with Mate.
gaory1 commentedon Jun 12, 2023
This issue happens to me too. The icons of two Goland windows are shown as the Chromium icon.
I don't know how and when does it happen.
Linux Mint 21.1 Cinnamon
Cinnamon 5.6.5
sohailb108 commentedon Apr 23, 2026
For me it was the mismatching
StartupWMClassin.desktopfile and the result ofxprop WM_CLASS.I wrote my fix here: https://unix.stackexchange.com/a/805588/343279
Sounds like the
Web Apptool needs to set theStartupWMClassto what Chromium makes!Chromium ignores the --class flag when --app=URL is used and instead derives WM_CLASS from the app URL itself. It takes the URL host+path and converts it to a valid X11 class by replacing characters like . and / with _. So https://www.google.com/maps becomes www.google.com__maps.
For Firefox-based browsers, the exec string passes --class WebApp-{codename} and Firefox respects it, so WM_CLASS stays as WebApp-{codename} — the manager-assigned value.